curl https://get.acme.sh | sh

~/.acme.sh/acme.sh --register-account -m EMAIL

~/.acme.sh/acme.sh --issue -d DOMAIN --standalone

~/.acme.sh/acme.sh --issue -d DOMAIN --dns --yes-I-know-dns-manual-mode-enough-go-ahead-please

~/.acme.sh/acme.sh --renew -d DOMAIN --yes-I-know-dns-manual-mode-enough-go-ahead-please

~/.acme.sh/acme.sh --installcert -d DOMAIN --key-file /root/private.key --fullchain-file /root/cert.crt

Link: github